fuel RENAULT TWINGO RS 2009 2.G Electrical Equipment Workshop Manual

88A-2
WIRING HARNESS
Wiring: Precautions for the repair
88A
I - SAFETY
1 - Potentially dangerous components
Do not leave any unused +12V connectors exposed to
the air without any protection (see Connector: Sea-
ling and locking) (Technical Note 6015A, 88A, Wi-
ring).
Check that there is no contact between the wiring and
the fuel and brake pipes.
Avoid mounting the wiring in areas with a temperature
above 100˚C.
2 - Advice to be followed before any operation
Before carrying out any work on the wiring, disconnect
the battery.
3 - Instructions to be followed during the operation
To prevent the wiring from being damaged, check that
the surrounding area is not mechanically harmful (e.g.:
door windows, sharp corners, burrs, studs, etc.).
The wiring should be at least 30 mm away from any
moving components (belt, pulley, steering column,
etc.).
Depending on the surrounding area, check that the
unused connectors respect the necessary sealing
constraints (see Connector: Sealing and locking)
(Technical Note 6015A, 88A, Wiring).
All of the connections (connectors) used in the engine
compartment are sealed; do not remove the seal from
around the connectors.II - GENERAL RECOMMENDATIONS
Do not connect an earth to a stud with insulating pro-
tection (paint,etc.).
Do not use more than two earth terminals on the same
point.
Do not use power earths on the same point as electro-
nic earths.
To prevent water flowing into the connectors, make a
low point just on the wiring routing (just before the con-
nector).
For connections between fixed and mobile compo-
nents, secure the wiring on the fixed part.
Overlapping of the battery feed wires (positive and ne-
gative) causes disruption; they must be secured sepa-
rately.
Wiring mountings:
- use plastic clips, ensuring that the colour coding is
respected,
-do not use steel clips that are not protected with rub-
ber,
- keep the clips integrated into the wiring during a re-
placement operation,
- do not leave steering wheel wires without protection.
Check that:
- the shunts are correctly secured,
- the connectors are correctly housed and locked.
Wiring routing:
- when it is visible it must be aesthetically pleasing, and
resemble the routing marked during removal,
- prohibit wiring routing in grooves and overlaps (risk of
wear through friction),
- prohibit mounting several wires on the same clip,
- do not lock the connectors or wiring in areas that are
sensitive to drilling (number plate etc.). WARNING
To prevent damaging the connectors, consult the
disconnection procedure (see Connector: Discon-
nection and reconnection) (Technical Note
6015A, 88A, Wiring).
WARNING
To prevent any risk of noise, premature wear, short
circuits, etc. after the refitting operation, mark the
wiring routing and how to connect the connectors.
WARNING
To prevent any damage during the removal opera-
tion, check that the wiring is free from its mountings
(retaining clip, plastic clip, adhesive tape, connec-
tor, etc.).

88A-14
WIRING HARNESS
Engine wiring: Connector access
88A
Accessing the R 37 connector
aDisconnect the R 37 connector.
Accessing the R 37 connector
aRemove the air filter unit (3) (see Air filter unit: Re-
moval - Refitting) (MR 411, 12A, Fuel mixture).aDisconnect the R 37 connector. D7F
121737
D4F
120409
D4F, and 740 or 772
121733

88A-15
WIRING HARNESS
Engine wiring: Connector access
88A
aDisconnect the R 37 connector.
Accessing the R 22 connector
aRemove:
-the air filter unit (3) (see Air filter unit: Removal -
Refitting) (MR 411, 12A, Fuel mixture),
-the battery (see 80A, Battery, Battery: Removal -
Refitting, page 80A-2) ,-the battery tray (see 80A, Battery, Battery tray:
Removal - Refitting, page 80A-6)
aDisconnect the injection computer connectors (4) .
aRemove:
-the injection computer support bolts,
-the engine harness nut,
-the injection computer mounting with the computer.
aDisconnect the R 22 connector. D4F, and 780
121765
JH1
120409
120779
114157

88A-16
WIRING HARNESS
Engine wiring: Removal - Refitting
K9K
88A
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (MR 411, 02A, Lifting equip-
ment).
aSwitch off the ignition.
aRemove:
-the engine cover,
-the battery (see 80A, Battery, Battery: Removal -
Refitting, page 80A-2) ,
-the air filter unit (see Air filter unit: Removal - Re-
fitting) (MR 411, 12A, Fuel mixture),
-the battery tray (see 80A, Battery, Battery tray:
Removal - Refitting, page 80A-6) ,
aRemove:
-the bolts (1) ,
-the cover to the engine compartment connection
unit.II - REMOVAL OPERATION FOR PART
CONCERNED
a IMPORTANT
Consult the safety and cleanliness advice and ope-
ration recommendations before carrying out any
repair (see 88A, Wiring harness, Wiring: Precau-
tions for the repair, page 88A-2) .
121212
WARNING
To prevent any risk of noise, premature wear,
shor t circuits, etc. after the refitting operation,
mark the wiring routing and how to connect the
connectors.

88A-18
WIRING HARNESS
Engine wiring: Removal - Refitting
K9K
88A
-the connector from the water detection sensor on
the fuel filter (4) ,
-the camshaft position sensor connector (5) ,
-the pinking sensor connector (6) ,
-the turbocharging pressure sensor connector (7) ,
-the air temperature sensor connector (8) ,
-the injector connector (9) ,
-the heater plugs connector (10) ,
-the fuel temperature sensor connector (11) ,
-the fuel rail pressure sensor connector (12) ,
-the diesel injection computer connectors (13) ,
-the pre-postheating unit connector (14) ,
-the exhaust gas recirculation solenoid valve con-
nector (15) ,
-the coolant temperature sensor connector (16) ,
-the crankshaft position sensor connector (17) ,
-the reversing lights switch connector (18) ,
-the front of engine wiring/engine harness connec-
tor (19) .
aDisconnect the cooling fan assembly connector (20)
.aDisconnect:
-the engine cooling fan assembly connector (21) ,
-the engine cooling fan assembly resistor connector
(22) ,
-the refrigerant fluid pressure sensor connector (23)
,
-the air conditioning compressor connector (24) .
aRemove:
-the alternator earth wiring nut (25) ,
-the nuts from the starter supply and earth terminals
(26) ,
-the engine earth wiring nut (27) ,
-the positive battery terminal wiring nut (28) ,
-the earth wiring nut on the front left-hand side
member (29) ,
-the battery protection fuse wiring nuts (30) ,
-the wiring mounting nut on the battery protection
fuse board (31) ,
-the engine compartment connection unit supply wi-
ring nut (32) .
aUnclip:
-the section of wiring on the cylinder head, STANDARD HEATING
122359
AIR CONDITIONING
125249

88A-19
WIRING HARNESS
Engine wiring: Removal - Refitting
K9K
88A
-the section of wiring on the cylinder block and sub-
frame,
-the section of wiring on the engine cooling fan as-
sembly.
aRemove the engine harness.
REFITTING
I - REFITTING PREPARATIONS OPERATION
aIf replacing with a complete wiring harness, lock the
unused connectors (see Connectors: Sealing and
locking) (Technical Note 6015A, 88A, Wiring).
II - REFITTING OPERATION FOR PART
CONCERNED
aRefit the engine harness.
aConnect the engine cooling fan assembly connector.
aConnect:
-the air conditioning compressor connector,
-the refrigerant fluid pressure sensor connector,
-the engine cooling fan assembly resistor connec-
tor,
-the engine cooling fan assembly connector.
aConnect:
-the engine harness/front of engine wiring connec-
tor,
-the reversing lights switch connector,
-the crankshaft position sensor connector,
-the coolant temperature sensor connector,
-the air inlet temperature sensor connector,-the exhaust gas recirculation solenoid valve con-
nector,
-the connector to the pre-postheating unit,
-the diesel injection computer connectors,
-the fuel rail pressure sensor connector,
-the fuel temperature sensor connector,
-the heater plugs connector,
-the injector connectors,
-the air temperature sensor connector,
-the turbocharging pressure sensor connector,
-the pinking sensor connector,
-the camshaft position sensor connector,
-the connector from the water detection sensor on
the fuel filter,
-the alternator connector,
-the oil pressure sensor connector.
aRefit:
-the engine compartment connection unit supply wi-
ring nut,
-the wiring mounting nut on the battery protection
fuse board,
-the battery protection fuse wiring nuts,
-the earth wiring nut on the front left-hand side
member,
-the positive battery terminal wiring nut,
-the engine earth wiring nut,
-the starter supply and earth terminal nuts,
-the alternator earth wiring nut.
aClip:
-the section of wiring on the cylinder head,
-the section of wiring on the cylinder block and sub-
frame,
-the section of wiring on the engine cooling fan as-
sembly.
III - FINAL OPERATION.
aRefit:
-the battery tray (see 80A, Battery, Battery tray:
Removal - Refitting, page 80A-6) ,
-the air filter unit (see Air filter unit: Removal - Re-
fitting) (MR 411, 12A, Fuel mixture), WARNING
To prevent any damage during the removal ope-
ration, check that the wiring is free from its moun-
tings (retaining clip, plastic clip, adhesive tape,
connector, etc.).
STANDARD HEATING
AIR CONDITIONING

88A-21
WIRING HARNESS
Engine wiring: Removal - Refitting
D4F, and 780
88A
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (MR 411, 02A, Lifting equip-
ment).
aSwitch off the ignition.
aRemove:
-the engine cover,
-the battery (see 80A, Battery, Battery: Removal -
Refitting, page 80A-2) ,
-the air filter unit (see Air filter unit: Removal - Re-
fitting) (MR 411, 12A, Fuel mixture),
-the battery tray (see 80A, Battery, Battery tray:
Removal - Refitting, page 80A-6) .
aRemove:
-the bolts (1) ,
-the cover to the engine compartment connection
unit.II - REMOVAL OPERATION FOR PART
CONCERNED
a IMPORTANT
Consult the safety and cleanliness advice and ope-
ration recommendations before carrying out any
repair (see 88A, Wiring harness, Wiring: Precau-
tions for the repair, page 88A-2) .
121212
WARNING
To prevent any risk of noise, premature wear,
shor t circuits, etc. after the refitting operation,
mark the wiring routing and how to connect the
connectors.

88A-22
WIRING HARNESS
Engine wiring: Removal - Refitting
D4F, and 780
88A
aDisconnect:
-the fuel vapour absorber connector (2) ,
-the upstream oxygen sensor connector (3) ,
-the air inlet pressure sensor connector (4) ,
122364
122365122368

88A-24
WIRING HARNESS
Engine wiring: Removal - Refitting
D4F, and 780
88A
-the section of wiring on the cylinder block and sub-
frame,
-the section of wiring on the engine cooling fan as-
sembly.
aRemove the engine harness.
REFITTING
I - REFITTING PREPARATION OPERATION
aIf replacing with a complete wiring harness, lock the
unused connectors (see Connectors: Sealing and
locking) (Technical Note 6015A, 88A, Wiring).
II - REFITTING OPERATION FOR PART
CONCERNED
aRefit the engine harness.
aConnect the engine cooling fan assembly connector.
aConnect:
-the air conditioning compressor connector,
-the refrigerant fluid pressure sensor connector,
-the engine cooling fan assembly connector,
-the engine cooling fan assembly resistor connec-
tor.
aConnect:
-the engine harness/front of engine wiring connec-
tor,
-the connectors to the petrol injection computer,
-the reversing lights switch connector,
-the downstream oxygen sensor connector,
-the turbocharger solenoid valve connector,-the ignition coil connector,
-the motorised throttle valve connector,
-the turbocharger pressure sensor connector,
-the air temperature sensor connector,
-the pinking sensor connector,
-the alternator connector,
-the oil pressure sensor connector,
-the crankshaft position sensor connector,
-the coolant temperature sensor connector,
-the engine harness/injection wiring connector,
-the oil vapour recirculation hose reheater connec-
tor,
-the air inlet pressure sensor connector,
-upstream oxygen sensor connector,
-the fuel vapour absorber connector.
aRefit:
-the engine compartment connection unit supply
terminal nut,
-the wiring mounting nut on the battery protection
fuse board,
-the negative battery terminal wiring nuts,
-the positive battery terminal wiring nut,
-the earth wiring nut on the front left-hand side
member,
-the earth wiring nuts on the engine,
-the starter wiring nuts,
-the alternator earth wiring nut.
aClip:
-the section of wiring on the cylinder head,
-the section of wiring on the cylinder block and sub-
frame,
-the section of wiring on the engine cooling fan as-
sembly.
III - FINAL OPERATION.
aRefit:
-the battery tray (see 80A, Battery, Battery tray:
Removal - Refitting, page 80A-6) ,
-the air filter unit (see Air filter unit: Removal - Re-
fitting) (MR 411, 12A, Fuel mixture),
-the battery (see 80A, Battery, Battery: Removal -
Refitting, page 80A-2) , WARNING
To prevent any damage during the removal ope-
ration, check that the wiring is free from its moun-
tings (retaining clip, plastic clip, adhesive tape,
connector, etc.).
STANDARD HEATING
AIR CONDITIONING

88A-26
WIRING HARNESS
Engine wiring: Removal - Refitting
D4F or D7F
88A
REMOVAL
I - REMOVAL PREPARATION OPERATION
aPosition the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (MR 411, 02A, Lifting equip-
ment).
aSwitch off the ignition.
aRemove:
-the engine cover,
-the battery (see 80A, Battery, Battery: Removal -
Refitting, page 80A-2) ,
-the air filter unit (see Air filter unit: Removal - Re-
fitting) (MR 411, 12A, Fuel mixture),
-the battery tray (see 80A, Battery, Battery tray:
Removal - Refitting, page 80A-6) .
aRemove:
-the bolts (1) ,
-the engine compartment connection unit cover.II - REMOVAL OPERATION FOR PART
CONCERNED
a IMPORTANT
Consult the safety and cleanliness advice and ope-
ration recommendations before carrying out any
repair (see 88A, Wiring harness, Wiring: Precau-
tions for the repair, page 88A-2) .
121212
WARNING
To prevent any risk of noise, premature wear,
shor t circuits, etc. after the refitting operation,
mark the wiring routing and how to connect the
connectors.